Dipper-tooth.



;A. H. EXTON.

DFPPEH TOOTH.

, APPLICAUON FILED SEPT, 30; 1914.

Patented Apr 23,1918.

. Win/5835s barren rarnnr enr ch ALFRED H. EEZI'ON, 013 CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR T EDGAR ALLEN AMERICAN MANGANESE fiTEEL' COMPANY, OF AUGUSTA, MAINE, A CORPORA- TION 0F MAINE.

recast/a.

nrrrnn-roorn.

Application filed. fieptember 30, 1314. Serial. No. 864,250.

To all 107mm 2'25 may concern:

' Be it known that l ALFRED H. Enron, a citizen of the United States, and a resident of Chicago Heights, in the county of Cook. and State of Illinois, have made and in vented certain new and useful. Improve ments in Dipper Teeth, of which the fol lowing is a specification.

y invention relates to an improved dipper tooth for use 111 connection with steam or power shovels, and more particularly to;

a tooth designed for employment'with What are generally known and. referred to as drag line buckets; Heretofore it has been common practice to form the tooth for such a bucket in one piece, the base being of forged or carbon steel and having a'point of tool steel welded thereon. When this point becomes blunt or worn fromservice, it has been necessary either todiscard the entire tooth, or to encounter considerable labor and I expense in welding a new point thereon.

The object of my invention isto construct a tooth wherein. the general structure of the old form of tooth is preserved in order that it may be substituted for the. old structure ;of tooth in new equipment, or fitted to a drag-line bucket already in service, and this without change in the construction or dimensions of the bucket itself or of the tooth,

and in which tooth the point may beeau'silyand readily detached from the base when a of the base and not upon rivets or bolts which are likely to be sheared ofi, or broken, and to so shape the engaging parts that they will be locked in their proper relative positions, and so held, without the necessity of employing rivets or olts, or other fastening means.

With. these and other ends in view, my invention consists in certain novel features of. construction and combinations of parts as will be hereinafter fully described and pointed out in the claim.

-' In the accompanying drawing, Figure l is of the base,

a large numberof said retaining a view in side elevation of my improved tooth, the base and point being in their proper relative and assembled positions.

1 1g. 2 1s an lnverted plan view thereot. F1g.-3 IS a sectional now taken. on the hue specification of Letters Patent. Patented Apr. 233., 1913- 3-8 of Fig. 2 looking in the direction as indicated by the arrow. a

Fig. 4 is a sectional View taken .on the line 4--%t of Fig. 1.

Fig. 5 is "a perspective view of the detached point.

Fig-.13 is a perspective view of the forward end of the base, the point being Referring to the drawing, it ,will be seen that the tooth coni i'rises ajbase and a detachable point, the former being bifurcated to form a short upper jaw 6 and alonger lower jaw 7, each being provided with holes or perforations for the passage of rivets or bolts to secure it to the bucket (not shown),

a considerable amount of stock being left.

forward of the recess 9, forming a nose for the base and lnsurlng a sufliclent amount of stock to withstand the strain imposed upon it when" the tooth is in service.

llhe extreme end 10 of the base is in the form of an 0. G. curve, in order to form, v in eflect, a rearwardly extending shoulder 11, and a orwardl'v extending shoulder 12,

to receive the thrust of the detachable point hereinafter referred to.

This nose 'or forward end of the base is also provided with a recess or pocket extending from the extreme forward end 10 of the baseinto the lowerjaw 7 thereof, the upper wall 13 of this pocket merging into the under side or surface of the jaw 7 at 14, that is, preferably at a considerable distance to the rear of the forward endof the recess 9, this upper wall being inclined from the rear end thereof toward the forward end at which latter end the pocket hasa depth equal to the thickness of the forward end and of a thickness of the rear end of the detachable point 'hereinafter referred to. l w L The side-walls 15 of this pocket are also inclined, converging toward the bottom, 5

clearly illustrated in Fig. 4:, so that the pocket is not only Wedge'shape in the 'di,

rection of its length, but also trapezoidal in cross-section. It will also be seen that this pocket or recess extends entirely throu h to the lower sidoof the jaw 7, and is W 01137 formedin the nose of the base and in the lower jaw, that is, in those portions of the I base containingthe greater amount of stock in order to prevent unduly weakening the extreme forward QIld of the base.

i From this rear thicker side of the point extends a shank 22 wedge-shape in the direction of its lengthfand trapezoidal in crosssection, and of such dimensions as to nicely fit the pocket formed in the base, the under side or surface 23 of the shank forming a portion or contindation of the under side or surface of the jaw 7 and lying flush therewith, thesaid shank, as illustrated in Fig. 2,

occupying t middle portion thereof. 'T he depth of thi shank starts from nothing until at its forward end it is equal to that of the rear or thicker end of the detachable point,

A the upper side or surface of the shank merging into the upper surface of the point, and

the lower or under surface of the shank merging into the under side or surfs cc of the point.

From the foregoing it will be understood that when the base and point are assembled as illustrated in Fig. l, the shank 22 will largel assist in holding the parts in their locke' positions, the wedge-shape cross-section preventing the shank of the point from becoming disengaged. from the base in a vertical direction the shape'of the rear side of the point andeorresponding shape of the forward end of the base also assisting to this end. To disengaged from the base in a longitudinal direction, I employ a 'singleibolt or rivet 24- which-passes through openings formed in the base, and also through a registering opening formed in the shank 22, the ends of theriiret lyingfiush with the sides of the prevent the point from becoming welded point, as well as the outline, contour and dimensions of the base, but at the same time have avoided the objections raised against the old form of tooth, while incorporating therein all the advantages to be obtained from that structure of tooth comprising in parta detachable point.

What I claim is g A dipper tooth comprising a supportin r base the forward free end of which is curve in outline and downwardly and forwardly inclined, and the under side of which is provided with a centrally located recess or pocket wedge-shaped in cross-section and extending rearwardly from said inclined forward end lon itudinally of said base, and the forward on of which recess or pocket extends throughout the length of said inclined free end, said recess being wedgeshaped in outline and tapering from its forward to itsrear end; a removable point having inclined walls adapted to contact with the portions of the inclined forward end of said base upon each side of said recess, and

tapering centrally arranged shank wedgeshaped in cross-section adapted to fit within the recess in said base; and a holding mem ber extending through the side walls of said recess and through said shank to'thereby secure said removable point and base together. Signed at Chicago Heights, in the county of Cook and State of Illinois, of September, A'. D. 1914. c

' ALFRED. H. EXTON. Witnesses:

RUTH GREEN, LUELLA S. McCLUnn.

this 15th day i 

